Figure 3
From: Giant circular dichroism of large-area extrinsic chiral metal nanocrecents
(a) The calculated CD spectra of the metal nanocrescent with the increase of θ. (b,c) Sketch of the optimum electric field distribution on the surface of the nanocrescent of circularly polarized light to excite dipole and tripolar modes, respectively. The black arrows show the polarization direction of pump light. The red dashed lines stand for positive charges and blue dashed lines stand for negative charges.
